Pipe gauging device



B. G. FJELLSTRCM 3,365,804

PIPE GAUGING DEVICE Jan. 30, 1968 Filed April 26, 1965 2 Sheets-Sheet 1INVENTOR 9 7 Hi6. FJEtLif/EJ! I BY New, wpfihw /j I 3 ATTORNEYS 1953 B.G. FJELLSTRGM 3,365,804

PIPE GAUGING DEVICE 4 6". FJELLST' M ATTORNEY;

INVENTOR United States Patent Ofiice 3,365,804 Patented Jan. 30, 19683,365,394 PIPE GAUGING DEVEQE Bengt Gottfrid Fjelisti'iim, Johanneshov,Sweden (Salti'mgsvagen 26, Nacka, Sweden) Filed Apr. 26, 1965, Ser. No.456,757 Claims priority, application Sweden, Apr. 27, 1964, 5,203/64 2filaims. (Cl. 33180} ABSTRACT OF lHn DISCLOSURE the pipe coincides withthe geometrical main axis of the L tool. A hearing body lockable to theguide rail in various angle settings is provided with said bearing bodyrotatably mounted on the guide rail arranged for gauging the bendingplane at the bend to be gauged. An angle gauging lever is arranged in aplane at right angles to the bearing body and arranged to gauge thebending angle for the bend to be gauged.

The present invention relates to a device for determining the appearanceof a bent pipe. The invention is intended to be used in combination witha table into which data concerning the pipe has been recorded in theform of numerical information.

The pipe gauging device is primarily intended to be used for gaugingpipes forming a space pattern, and forms a connection between twoconnecting points.

One embodiment of the invention is shown in the attached drawings, inwhich:

FIG. 1 is a perspective view of the tool.

FIG. 2 shows a guide-rail and slide-saddle constituting the rear sectionof the tool and on which a pipe is positioned in order to gauge thefirst straight portion of said pipe.

FIG. 3 is a perspective view of front section of the tool together witha pipe positioned so that the angle of the first bend can be gauged.

FIG. 4 is a perspective view of the tool together with a pipe and thefirst bend of said pipe secured on the slide during the gauging of thestraight section of the pipe between the first and second bend and thedifference between the bending plane of said bends and also the angle ofthe second bend.

FIG. 5 is a perspective view of the front section of the tool suppliedwith a pipe bending device.

FIG. 6 is a perspective view of a traveller positioned on the guiderail.

FIG. 7 shows as an example of a pipe-bending table compiled of numericaldata.

FIG. 8 is a cross-sectional view taken upon section line a--a of FIG. 1.

In the drawings the reference numeral 1 indicates a frame member onwhich certain components are arranged. An attachment shoulder 2 servesas a means for clamping the tool when in use. The reference numeral 3shows a slide-saddle, the upper part of which forms a fixing plane. Achangeable plate 3' is positioned on said slide and secured to the sameby means of pin 6. Also positioned on the slide 3 is a bracket 3" for aclamping piece 5. The slide-saddle 3 can run along a guide-rail 4 whichconstitutes a continuous guide and which is marked off with longitudinalmeasuring graduations. The reference numeral 4' indicates astrenigthener in the lower rear section of the rail 4. The function ofclamping piece 5, which carries two guide plates 5 against which thepipe bends are to be secured, is to clamp the pipe against the planeupper section of the slide 3. A lever 7 is movably mounted on theclamping piece 5, which is in turn movably mounted at the bracket 3",the function of said lever 7 being to hold the clamping piece 5 pressedagainst the pipe. The lever 7 constitutes a spring and is locked fastunder a projecting section on slide 3. The reference numeral 8 indicatesa guide member, the function of which is to guide the pipe during thebending and gauging operation. The guide member 8 is changeablyconnected to the bearing body 15 by means of a track 15", which extendson the bearing body 15 and is locked fast by a shaft 8 through the pin 8(as shown in FIGS. 1 and 8) which is pressed into the shaft 8' to becomepart of the shaft which also forms a securing point for a bending device9. The guide member 8 can be rotated in the frame member 1 by means ofthe bearing body 15, which is graduated, and can be locked by frictionto said frame member 1 by means of a locking screw 10 which is threadedon 15. The bearing body 15 is held in place by a guide plate 11. In theembodiment shown, the bending device 9 consists of a movable wheel and alever, and can be dismantled from the guide member 8. The designation 12indicates a traveller on which two locking screws 13 and 14 arepositioned. The traveller 12, similarly to the slide 3, can run alongthe rail 4 and can also be locked fast to the same. The designation 16shows a graduated disc intended for gang ing bends made in pipes, saiddisc 16 being displaceably secured on the track 15 on the bearing body15. A lever 17 is rotatably mounted in the centre of the graduated disc16, 17 shows a screw which is screwed tight on the lever 17 and lockedby a spring 17". The screw 17' forms a stop bolt which, according toFIGS. 3 and 4, presses against the pipe for determining the angle ofbend. The reference numeral 18 shows a dolly connected to the bearingmember 15 by means of a screw 18', the function of the dolly 18 being toguide the pipe so that the pipe will lie close against the radius ofguide 8 in order to get a correct measuring of the straight section,with larger dimensions (small ones can easily be controlled by hand),during the gauging operation, and also to absorb reaction forces whilethe pipe is being bent.

DESCRIPTION OF OPERATION The tool is clamped in a vice or the like withthe attachment shoulder 2 positioned between the jaws. Gaugingcommences. (In this description it is assumed that gauging can beefiected without it being necessary to use the dolly 1s.

GAUGING THE FIRST STRAIGHT SECTION The clamping piece 5 is opened up sothat the pipe can be placed in the tool. The pipe is positioned so thatthe first straight section lies along the rail 4 so that the straightsection follows the head axis along the tool as shown in FIG. 2, and thefirst bend lies against the curved plate 5 on the clamping piece 5 andis locked against the plane on the slide 3 by the lever 7. The slide 3is thereafter passed along the guide rail 4 until the end of the firststraight section of the pipe is positioned in front of the firstgraduated disc line. The length is determined with the assistance of thegraduations on the rail 4. The length of the first straight section isrecorded in the first column of the table of pipe-bending data, see FIG.7.

GAUGING THE FIRST BEND The clamping piece 5 is opened and the piperemoved from the tool. The bearing body 15 is locked in an arbitaryrotation-plane. The pipe is then positioned in the gauge device with thefirst bend pressed tight against the guide member 8 so that an arbitraryportion of the first straight length reaches the slide 3, as shown inthe FIG. 3. The clamping piece is closed down and the pipe locked fastagainst the plane upper section of the slide. The first bend is thengauged with the assistance of the lever 17, and the angle read off fromthe graduated disc. The angle of the first bend is thereafter recordedin the second column of said pipe-bending table, see FIG. 7.

GAUGING THE STRAIGHT SECTION BETWEEN THE FIRST AND SECOND BENDS Theclamping piece 5 is opened and the pipe removed from the tool. Thefirst, newly gauged, bend is placed on the plane upper section of theslide 3 with the straight portion betweenvthe first and second bendspositioned in the longitudinal direction of the guide rail 4 so that thesecond bend can be laid against the guide member 8, as shown in FIG. 4.The first bend is positioned so that it lies against the curved plate 5on the clamping piece 5.

We assume that the second bend lies in another plane in relation to thefirst.

The straight length between the first and second bends is adjusted bypassing the slide 3 along the guide rail 4 until the second bend liesagainst the arcuate track in the guide member 8 (the bearing body isrotated until the correct bending plane is obtained with respect to thedifference between the plane of the first and second bend, see FIG. 4),whereafter the bearing body 15 is locked fast to the frame 1 by thelocking screw 10. The straight length between the first and second bendsis read from the graduated rail 4 at the back of slide 3, and recordedin the third column of the pipe-bending table. The :angle diiference,between the plane of the first and second bend is read off from thegraduated bearing body 15 and recording in the top half of the fourthcolumn of said table.

The second bend is gauged and recorded in the bottom half of the fourthcolumn of said table. Continued gauging of the pipe is carried out inthe same way as described above.

The following components of the tool can be change in order to makepossible the gauging of pipes of difierent sizes and radii:

The clamping piece 5, plate 3', guide member 8, lever 17, dolly '18 andthe traveller 12.

It can be seen from the above that straight pipe can be bent in thegauging device, by using the bending device 9, and gauged at the sametime. This method can be applied when, for example, bending prototypepipes or when bending pipes according to a plan or drawing.

By the straight length of the pipe is meant the length from the end ofthe pipe of the beginning of the radius of the first bend and thestraight section between two bends,

4 USING THE TRAVELLER 12 The traveller 12, shown in the drawing, is usedwhen the straight length projects beyond the graduations along the rail4.

Subsequent to clamping the pipe in the slide 3, said slide is passedalong the guide rail 4 until it reaches the extreme graduation line,whereafter the traveller 12 is placed sideways over the pipe with oneend directly :over the first graduating line. The pipe is locked fast inthe traveller 12 with the assistance of locking screw 13. The clampingpiece 5 can now be opened up and the slide removed from the guide rail4. The traveller 12 can be secured to the rail 4 by means of the lockingscrew 14 when the slide 3 is removed from said guide rail. Saidtraveller is then moved along the rail 4 carrying the pipe with it tothe required length. If the straight length projects a distance morethan twice the length of the graduations on the rail 4, a furthertraveler of the same type is used. With two such travellers 12 anystraight length Whatever can be adjusted independent of its length.

What I claim is:

1. A gauging device for pipes provided with one or more bends lying inone or more bending plates, for establishing the difierent bendingplanes and angles of the bent pipe comprising a guide rail, a slidemovable along said guide rail, securing means on said slide for securinga bent pipe to said slide at the bend immediately in front of the bendto be gauged so that the intermediate straight section of said pipecoincides with the longitudinal axis of said device, a bearing body,means for locking said hearing body to said guide rail at variousangular settings, said bearing body being rotatably mounted on saidguide rail to move around said longitudinal axis in a plane at rightangles or the same to gauge the bending plane at the bend to be gauged,and an angle gauging lever mounted in a angles to the same to gauge thebending plane at the bend to be gauged, and an angle gauging levermounted in a plane at right angles to said bearing body to gauge theReferences Cited I UNITED STATES PATENTS 2,832,152 4/1958 Blackshaw33-180 2,973,581 3/1961 Rhodehamel 33174 3,038,261 6/1962 Blain 331803,060,587 10/1962 Picken 33174 3,245,201 4/1966 Richardson 33-180 SAMUELS. MATTHEWS, Primary Examiner.

